522 
PHILOSOPHICAL SOCIETY OF WASHINGTON. 
Mr. W. H. Dall made a communication on A Miocene climate 
in arctic Siberia. [Published in Proceedings of the U. S. National 
Museum. 8°, Washington, 1893, vol. 16, pp. 471-478. Also 
noticed in the American Journal of Science. 8°, New Haven, 
1893, Nov., 3d series, vol. 46, no. 275, pp. 399-400.] 
Mr. F. H. Bigelow 7 exhibited and described A model globe, 
showing the magnetic forces that produce the diurnal variation 
of the needle. [Published in Astronomy and Astro-Physics. 8°, 
Northfield, 1893, Oct., vol. 12, no. 8, pp. 706-717.] 
Remarks were made by Messrs. Hall, Mendenhall, and 
Farquhar. 
404th Meeting. April 15, 1893. 
President Goode in the chair. 
Thirty-three members and guests present. 
Mr. B. R. Green made a communication on The pyramidion 
of the Washington monument. [Not published.] 
This was discussed by Messrs. Abbe, Farquhar, Casey, Hark- 
ness, Bates, Mendenhall, Paul, Gilbert, Dall, and Green. 
Mr. Cleveland Abbe made a communication on The height 
of the Aurora Borealis. [Not published.] 
Remarks were made by Messrs. Dall, Harkness, Menden¬ 
hall, Hallock, and Abbe. 
405th Meeting. April 29, 1893. 
Vice-president Fletcher in the chair. 
Twenty-eight members present. 
Announcement was made of the election to membership of 
John Henry McCormick. 
Professor Abbe made a communication on Measurements of 
the growth of plants with an auxanometer. [Not published.] 
Remarks were made by Mr. Diller. 
